Revolverstantpresse

摘要

The turret punch press (1) comprises : a C-shaped main frame (3); a workpiece transfer and positioning device (9) ; at least a freely rotatable upper turret (21, 21B) a freely rotating lower turret (25, 25B) respectively supporting a plurality of punches (19) and a plurality of dies (23); a striker (17) provided on the main frame (3, 3U) for striking the punches (19), and at least a holder frame (31, 31B) having an upper arm (33U) and a lower arm (33L), respectively supporting said upper turret (21, 21B) and said lower turret (25, 25B). In order to prevent the reaction forces generated during the punching operation and transferred by the striker (17) to the upper arm (34) of said main frame (3) from bending up wardly and deforming said upper arm and from inclining the striker axis with respect to the vertical axis thereby deteriorating the punching tools (19), the holder frame (31, 31B) is mounted on a tie-rod-shaped vertical shaft (27) in the opening (5) of the main frame (3), and, at the end section of said opening (5), the upper and lower ends of the tie-rod-shaped vertical shaft (27) are respectively secured to the ends of the upper (3U) and lower frame arms (3L) of said main frame (3).